<html>
<head><meta charset="utf-8"><title>max-rss regressed on 11-03 · t-compiler · Zulip Chat Archive</title></head>
<h2>Stream: <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/index.html">t-compiler</a></h2>
<h3>Topic: <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/max-rss.20regressed.20on.2011-03.html">max-rss regressed on 11-03</a></h3>

<hr>

<base href="https://rust-lang.zulipchat.com">

<head><link href="https://rust-lang.github.io/zulip_archive/style.css" rel="stylesheet"></head>

<a name="147482056"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/max-rss%20regressed%20on%2011-03/near/147482056" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nagisa <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/max-rss.20regressed.20on.2011-03.html#147482056">(Nov 11 2018 at 16:06)</a>:</h4>
<p><a href="https://perf.rust-lang.org/index.html?start=2018-11-02&amp;end=2018-11-04&amp;absolute=true&amp;stat=max-rss" target="_blank" title="https://perf.rust-lang.org/index.html?start=2018-11-02&amp;end=2018-11-04&amp;absolute=true&amp;stat=max-rss">https://perf.rust-lang.org/index.html?start=2018-11-02&amp;end=2018-11-04&amp;absolute=true&amp;stat=max-rss</a></p>



<a name="147482057"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/max-rss%20regressed%20on%2011-03/near/147482057" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nagisa <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/max-rss.20regressed.20on.2011-03.html#147482057">(Nov 11 2018 at 16:06)</a>:</h4>
<p>any thoughts?</p>



<a name="147482131"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/max-rss%20regressed%20on%2011-03/near/147482131" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> nagisa <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/max-rss.20regressed.20on.2011-03.html#147482131">(Nov 11 2018 at 16:09)</a>:</h4>
<p>Seems to be <a href="https://github.com/rust-lang/rust/compare/757d6cc91a691c8a749a7b0eee09df494ecdcc3...b6e8f9dbdc4f154d799589ce5e21c020c51f2123" target="_blank" title="https://github.com/rust-lang/rust/compare/757d6cc91a691c8a749a7b0eee09df494ecdcc3...b6e8f9dbdc4f154d799589ce5e21c020c51f2123">removal of jemalloc</a></p>



<a name="147516182"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/max-rss%20regressed%20on%2011-03/near/147516182" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> mw <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/max-rss.20regressed.20on.2011-03.html#147516182">(Nov 12 2018 at 10:05)</a>:</h4>
<p>from reading the comments (haven't looked at the actual code) it sounds like:<br>
 - we are still using jemalloc in rustc (so it's not the system allocator that causes the regression)<br>
 - but jemalloc has been upgrade from 4.x to 5.x</p>



<a name="147516196"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/max-rss%20regressed%20on%2011-03/near/147516196" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> mw <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/max-rss.20regressed.20on.2011-03.html#147516196">(Nov 12 2018 at 10:06)</a>:</h4>
<p>maybe we can tweak some jemalloc settings to better fit rustc's profile</p>



<a name="147516257"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/max-rss%20regressed%20on%2011-03/near/147516257" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> mw <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/max-rss.20regressed.20on.2011-03.html#147516257">(Nov 12 2018 at 10:07)</a>:</h4>
<p>I'm sure that <span class="user-mention" data-user-id="120989">@nnethercote</span>  will take a look at this, given that they've spent lots of work on reducing rustc's memory usage.</p>



<a name="147516261"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/131828-t-compiler/topic/max-rss%20regressed%20on%2011-03/near/147516261" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> mw <a href="https://rust-lang.github.io/zulip_archive/stream/131828-t-compiler/topic/max-rss.20regressed.20on.2011-03.html#147516261">(Nov 12 2018 at 10:07)</a>:</h4>
<p>(if not, someone else should definitely do some profiling)</p>



<hr><p>Last updated: Aug 07 2021 at 22:04 UTC</p>
</html>